Thanks to a tip from a wonderful work colleague, I smartened up and used cans of beans as weights instead of the 3lb weights. My 1lb ones should arrive tomorrow, if not, beans again!
I'm not gonna lie, it still kicked my butt but I am still motivated to keep it up. She mentions that people on day 5-7 are probably finding it easier to keep up.... When I get there, I'll let you know if I agree.